Disk harrow



L. H. KAUPKE.

DISK "ARROW.

APPLICATION FILED JULY 29, 918- 1 39,01, I Patented Dec. 6, 1921.

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DISK HARROW.

APPLICATION FILED JULY 29. 1918.

Patented Dec. 6, 1921..

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LEE H. KA'UPKE, OF ROCK ISLAND, ILLINOIS, ASSIGNOR '10 ROCK ISLAND PLOW COMPANY, OF ROCK ISLAND, ILLINOIS, A CORPORATION OF ILLINOIS.

msx naaaowf To all whom it may concern:

Be it known that 1, LEE H; KAUPKE, a citizen of the United States of America, and resident of Rock Island, Rock Island county, Illinois, have invented a certain new and useful 1m rovement in Disk Harrows, of which the ollowing is a specification.

My invention relates to an improvement in disk-barrows, and particularly to that type wherein two complete harrows are arranged in tandem relation.

The objects of my invention are to provide an improved construction for thus connectingthe sets of disk gangs in tandem relationship, and to otherwise generally 1mprove the construction and arrangement of parts whereby a more efiicient structure will be obtained.

My invention is particularly adapted for use in connection with tractor-drawn implements, although it is not limited to such type of implement.

In the accompanying drawings, I have illustrated one specific embodiment of my invention in which- Figure 1 is a plan View of a harrow embodylng the features of my invention.

Fig. 2 is a side elevation.

Fig. 3 is a detail sectional view on the line 3-.-3 of Fig. 2, looking in the direction of the arrows.

Fig. 4 is an enlarged detail view of the forward end of the harrow.

Fig.5 is a detail sectional view taken on the line 5-5 of Fig. 4.

Fig. 6 is a partial plan view of the parts shown in Fig. 4.

I have illustrated two disk-barrows arranged in tandem relationship. The rear harrow comprises two disk gangs 11 and 12, carried by a pair of transverse bars 13, 13 in the usual and well-known manner. These two sets of disk gangs 11 and 12 are pivotally mounted on a frame which consists of the transverse frame bar 15 and a pair of forwardly extending frame bars 16, 17, which, 'asclearly shown in Fig. 2, extend first upwardly and then downward on a slight incline, thereby forming an archshaped structure. These two frame bars 16, 17, converge toward one another, and at their forward ends are secured together by means of the transverse strap 18. To the center of this strap 18 there is connected a casting 19, which is provided with a fiat specification of Letters Patent.

- Application filed July 29,

opposite ends of this transverse member is a Patented m. e, i921.

1918. serial no. 247,119.

horizontal ear 20 for securing said casting to the transverse strap, and at its forward end 1s provided with a fiat vertically extending ear 21. Pivotally mounted on this casting, on the pin 22, there are a pair of forwardly extendin draft arms 23, which are adapted to be he d in various angular positions by means of the pin 24 which engages with any one of a series of holes 25 in the ear 21. With this arrangement, it will be seen that these two draft arms can be held rigidly in any one of a plurality of angular positions, whereby the elevation of the front ends of these draft arms may be varied. The front ends of these draft arms are adapted to be connected to a suitable clevis 26, which is usually connected to the rear of a tractor, or some other source of draft power. By means of the'adjustability of the arms 23, they are adapted to be connected with clevises of varying heights.

The casting 21 is provided with a vertical bearing for the king pin 27, which king pin is held rigidly within such casting by means of the pin 28. This king pin extends downwardly below the casting 19, and forms a vertical pivotal bearing for the casting 29. This casting carries a horizontal pivot, consisting of the pin 29*, for the two parallel straps 30, which at their rear ends are secured to the forward end of two angle bars 3O which form part of the frame for the forward barrow, and which extend rearwardly, being connected at their rear ends to the transverse member 31. Secured to the frame member consisting of the arch-shaped bar 32, as shown in Fig. 1, thus forming with the transverse member 31 a triangularshaped draft frame for the forward disk harrow.

- This forward disk harrow likewise consists of two disk gangs 33, 34, carried by the transverse bars 35, 36. These disk gangs are pivotally connected to the outer ends of the transverse frame bar 31 by means of the 100 straps 37, which extend between the transverse bars 35, 36 and the frame bars, and the downwardly extending straps 38 which are connected to the axis of the disk gangs and form a pivotal support for the same.

. In order to provide means for varying the angling position of the various disk gangs, I provide hand levers located at the forward end of the implement and within easy reach of an operator on the tractor. To angle the 11s disks of the forward harrow, I provide a hand lever 39 which is pivotally mounted on the cross member 40 carried by the archshaped member 41, which in turn is mounted on the angle bars 30. The lower end of this hand lever is pivotally connected to two rearwardly extending arms 42, oneof which is connected to the inner end of the gang 33, and the other of which is connected to the inner end of the gang 34. The arch member 41 is provided with a series of rack teeth and the hand lever is rovided with the usual spring tooth, where y the hand lever can be held in any adjusted position. It will be readily seen that by movement of the hand lever in a forward and back direction that the angling position of the disk gangs of the forward harrow can be varied, as desired.

In order to adjust the rear disks, I provide two hand levers 43,, one mounted near the forward end of each of the. frame bars 16 and 17. As each of these hand levers control the angling of one of the rear disks in a similar manner, a description of one will sufiicefor both.

A rearwardly extending arm 44 is connected to the hand lever 43, andat its rear end this arm is connected to a second downwardly and rearwardly extending arm 45,

which in turn is connected to the inner end.

of the rear disk gang. The pivotal bearing for the bars 44, 45, is carried by a swinging link 46, which is pivoted at its opposite end to a rearwardly extending bar 47 secured at its rear end to the transverse frame bar 15. The forward end of this bar 47 is connected to a transverse brace bar 48 which extends between the two frame bars 16, 17. In order to provide a more firm pivotal mounting between the bars 44, 45, and link 46, I provide an offset strap 49,carried by the bar 45, and connected to the pivotal point so as to hold the members 44 and link 46 between this olfset strap and the bar 45. With this construction, it will be seen that through proper movement of the hand lever 43, the rear disk gang can be suitably angled and the hand lever is adaptedv to be held in any adjusted position by means of the series of rack teeth 50 which is engaged by the usual spring tooth 51 carried on the hand lever 43.

In order to provide a suitable downward pressure on the disk gangs, I have mounted b on each of the front disk gangs the usual weight pans 52, and likewise on the rear harrow I provide suitable weight pans 53 supported by the brackets 54 secured to the transverse frame bar 15. These brackets support these weight pans somewhat to the rear of the center line of the disks, and in this manner the weight exerted by these pans operates through sufficient leverage to countor-balance the weight of the long forwardly extendlng frame of the rear harrow, thus enabling a more effective pressure to be exerted upon these rear disks. In order to apply a further downward pressure to the front disks, I have also provided a yoke 55, as clearly shown in Fig. 3, which is adjustably supported on the transverse frame bar 31. The transverse portion of this yoke is a very eflicient form of tandem disk harrow,

and one in which the rear harrow swings freely about the point of draft connection between the harrow and the tractor, while the front harrow freely pivots aboutan axis carried by the rear harrow, and in such relationship with the front pivotal connection that the disk gangs can be swung freely without danger of any interference between the disks of the front and rear harrows. I furthermore provide means for independently adjusting the angling position of the front and rear disk gangs, which means are in such position as to be readily accessible to the operator on the tractor.

While I have illustrated and described one specific embodiment of my invention, it will be understood that I do not wish to be limited to the exact construction shown and described, but that various changes and modifications may be made without departing from my invention.

What I claim as my invention is:

1. In an implement of the class described a rear harrow and a front harrow arranged in tandem relationship, each of said harrows consisting of two sets of disk gangs, a frame for said rear harrow extending forwardly and over said front harrow, a member secured to the front end of said frame, a pair of draft arms carried by said member extending forwardly thereof, and a bearing socket in said member carrying a king pin, a second member pivotally mounted on said king pin, and a frame for said forward-harrow pivotally connected to said second mem- 2. Inan implement of the class described, a pair of disk harrows arranged in tandem relationshi a frame for the rear harrow extending orwardly and over the front harrow, and means for mounting said harrows so that they are free to swing vertically independently of each other and are also free to swing laterally independently of each other about an axis located in substantially the center line of draft. 3. In an implement of the class described, a pair of disk harrows arranged in tandem relationship, a frame for said rear harrow extending forwardly and over the front harrow, a mounting for said rear harrow at the front end of said frame, whereby said rear harrow is free to swing laterally and Vertically, and a mounting for the front harrow carried by said frame and permitting the front harrow to swing laterally and vertically independently of the rear harrow.

4. In n implement of the class described, a pair of disk harrows arranged in tandem relationship, a suitable frame for said rear harrow extending forwardly and over the front harrow, connections for angling the disks of the rear harrow, said connections comprising a rearwardly extending jointed arm, and a swinging link carried by said frame for supporting the joint of said arm.

5.. In an implement of the class described, a pair of disk harrows arranged in tandem relationship, a suitable frame for said rear harrow extending forwardl and over the front harrow, connections or angling the disks of the rear harrow,said connections comprising an arm connected to the disk gangs and extending forwardly, a second arm piv-. otally connected to the forward end of said first mentioned arm, a hand-lever pivotally connected to the forward end of said second arm, and operative to reciprocate said arms, and a swinging link carried by the frame and supporting the pivotal connection between said arms.

6. In an implement of the class described,

front and rear harrows provided with disk frame for said front harrow, a frame for said rear harrow extending forwardly over said front frame, said frames being pivotally ,connected together, a pair of handlevers mounted at the forward end of said rear frame, in front of the disk gangs of the front harrow, connectionstherefrom to said rear disk harrow for angling the same, an independent hand-lever mounted at the forward end of said front harrow frame, and connections therefrom to said front harrow disks for angling the same.

7. In an implement of the class described, front and rear harrows arranged in tandem relationship and each provided with a pair of oppositely disposed disk gangs, a frame for the front harrow, a frame for the rear harrow extending over said front frame, said frames being pivotally connected together, a pair of hand-lever mounted at the forward end of said rear frame in front of the disk gangs of the front harrow, connections from said hand-levers to said rear disks for independently angling said disk gangs, a single hand-lever mounted at the forward end of said front harrow frame, and connections therefrom to each of said front disk gangs for simultaneously angling said front disk gangs.

Signed b me at Rock Island, Illinois, this 17 day of uly, 1918.

LEE H. KAUPKE. 

